dom / latest / storagemanager / persisted.html /

StorageManager.persisted()

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The persisted() method of the StorageManager interface returns a Promise that resolves to true if box mode is persistent for your site's storage.

Syntax

navigator.storage.persisted().then(function(persistent) { /* ... */ })

Parameters

None.

Returns

A Promise that resolves to a Boolean.

Example

if (navigator.storage && navigator.storage.persist)
  navigator.storage.persisted().then(function(persistent) {
    if (persistent)
      console.log("Storage will not be cleared except by explicit user action");
    else
      console.log("Storage may be cleared by the UA under storage pressure.");
  });

Specifications

Specification
Storage Standard
# dom-storagemanager-persisted

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
persisted
55
79
57
No
42
15.2
55
55
57
42
15.2
6.0

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https://developer.mozilla.org/en-US/docs/Web/API/StorageManager/persisted

Name Web APIs
Version
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Last Updated 2022-04-27T09:33:08Z